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Pemanfaatan Abu Terbang Batu Bara (Fly Ash) Sebagai Bahan Batako Yang Ramah Lingkungan L, Arif Hamidi; Aman, Aman; Drastinawati, Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The use of coal as fuel in industry gives rise to waste such as fly ash and bottom ash. Fly ash has high content of silica and alumina thus can be potentially utilized as construction materials. Fly ash also contains heavy metals of 8.95 ppm Pb , 5.375 ppm Cu and 7.798 ppm Cr. Disposal of this waste in the ash lagoon or stacked inside the industrial area poses a problem for the environment. In this study, fly ash is utilized as raw material for making brick with cement composition to sand ratio 1:6 and replacement of sand by weight of fly ash with variation of 10 , 20 , 30 , 40 % . Compressive strength and leaching test were conducted after 28 days. The result of compressive strenght test showed that block with a variation of 0 % fly ash produces compressive strength of 115 kg/cm2 , 10 % of 155 kg/cm2 , 20 % of 120 kg/cm2 , 30 % of 120 kg/cm2 , 40 % at 95 kg/cm2. TCLP test results showed that most of the heavy metal content of Pb , Cu and Cr are immobilized so well that fly ash can be used as a mixture of brick that are safe for the environment.  Keyword  : fly ash, soldifikasi, batako
Peningkatan Kemampuan Menceritakan Pengalaman Pribadi Dengan Menggunakan Metode Latihan Terbimbing Siswa Kelas VI SD Inpres 2 Lemo Aman, Aman; Karim, Ali; Yunidar, Yunidar
Jurnal Kreatif Tadulako Online Vol 5, No 12 (2017): Jurnal Kreatif Tadulako Online
Publisher : Jurnal Kreatif Tadulako Online

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Abstract

Permasalahan yang dikaji dalam penelitian ini adalah apakah dengan menggunakan metode latihan terbimbing dapat meningkatkan kemampuan siswa VI SD Inpres 2 Lemo dalam menceritakan pengalaman pribadi. Tujuan Penelitian ini adalah Untuk meningkatkan kemampuan siswa kelas VI SD Inpres 2 Lemo dalam menceritakan pengalaman pribadi dengan metode latihan terbimbing. Metode yang digunakan adalah mengacu pada model Kurt Lewin yaitu dilaksanakan secara bersiklus. Penelitian ini bersifat deskriptif kuantitatif dan kualitatif, data kuantitatif diperoleh dari hasil evaluasi pembelajaran siswa sedangkan data kualitatif diperoleh dari kegiatan proses pembelajaran di kelas. Hasil yang diperoleh dalam penelitian ini menunjukkan bahwa pada siklus I siswa yang tuntas belajar sebanyak 8 orang dengan presentase ketuntasan klasikal mencapai 50 %. Belum terpenuhinya standar pembelajaran maka dilanjutkan Siklus II, pada siklus ini ketuntasan siswa lebih tinggi dibanding siklus I yaitu mencapai 96,15 % yaitu dengan jumlah siswa yang tuntas sebanyak 25 orang dari 26 orang siswa. Peningkatan kemampuan siswa dalam belajar didukung oleh penggunaan metode latihan terbimbing dengan baik sehingga dapat memotivasi dan menarik minat siswa dalam belajar. Berdasarkan hasil tersebut dapat dikatakan penggunaan metode latihan secara terbimbing dapat meningkatkan kemampuan siswa menceritakan pengalaman pribadi kelas VI SD Inpres 2 Lemo. Kata Kunci: Menceritakan, Pengalaman Pribadi dan Metode Latihan Terbimbing.
Implementation of Reading Guide Strategy in Global Climate Change Material for Enhancement of Student Learning Outcome Arozaq, Miftahul; Aman, Aman; Sunarhadi, M. Amin
International Journal of Active Learning Vol 2, No 2 (2017): October 2017
Publisher : International Journal of Active Learning

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (417.622 KB) | DOI: 10.15294/ijal.v2i2.10803

Abstract

The hierarchy of climate change learning concepts needs to be studied in schools. In the last four to five years, the issue of climate change has gained wider attention in the development of long-term government policy and programming so that it is necessary to integrate programs and action into learning materials in schools to mitigate the impact Global climate change. One of the learning strategies for integrating climate change into school materials through a reading guide. Reading guide is part of the application of active learning approach emphasizes the participation of higher learners so as to create a conducive learning atmosphere. Reading Guide aims to help students be more focused and easy to understand lessons delivered by teachers. The research objectives are; 1). How to study climate change material before using learning guide reading 2). What is the result of studying climate change materials after using learning guide reading. The research method is done by comparing the learning result of the students before and after using the learning of reading guide. As a testing group are students of class X IPS 2 in SMA Al-Islam 1 Surakarta a number of 36 students. The instrument used is a test, used to determine the effectiveness of learning reading guide consisting of 25 items. The result of this research is the result of study of climate change material before using the average reading guide learning is 41,22. After studying climate change materials using learning guide guidance, there is an increase of learning result to an average of 53.11. The conclusions obtained from this study indicate that learning using the reading guide is affective
Menghilangkan Kondisi Berdebu pada Area 541-AS1 Ramadan, Pariz; Sholeh, Moch.; Junaedi, Dedi; Aman, Aman
Seminar Nasional Teknik Mesin 2019: Prosiding Seminar Nasional Teknik Mesin 2019
Publisher : Politeknik Negeri Jakarta

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Abstract

Dalam menjaga kelancaran proses produksi HRC di perlukan adanya pengecekan dan perawatan alat secara berkala sehingga dapat menghilangkan atau meminimalisir terhentinya proses produksi yang di sebabkan oleh kerusakan alat. Salah satu alat yang harus di perhatikan adalah gate air slide 541-AS1 pada jalur bypass antara HRC utara dan HRC selatan yang selalu menimbulkan kondisi berdebu pada saat dilakukan perbaikan air slide. Kondisi berdebu yang terjadi pada gate 541-AS1 di sebabkan karena adanya celah pada gate, sehingga ketika dilakukan perbaikan pada alat 541-AS1 debu hasil proses HRC selatan masih bisa melewati celah gate pada jalur bypass kedua HRC tersebut. Apabila tidak dilakukan perbaikan pada gate tersebut, maka akan tercipta dua pilihan keadaan. Pertama, mengabaikan safety para pekerja yang sedang memperbaiki air slide karena bekerja pada area berdebu. Dan yang kedua, apabila pekerja ingin bekerja tanpa kondisi berdebu proses produksi HRC selatan juga harus di hentikan. Oleh karena itu di perlukan adanya modifikasi pada gate 541-AS1, yang mana gate semula tidak berfungsi optimal akan di modifikasi dengan membuat slide gate dan akan menggantikan gate yang sebelumnya.
Kinerja Komposit Magnetik Graphene/Tio2/Fe3o4 Dalam Mendegradasi Fenol Dan Pemisahan Hasil Fotodegradasi Fenol Adharianti, Nia; Heltina, Desi; Aman, Aman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Titanium dioxide (TiO2) is the most widely used material in the photocatalysis process, one of which is to degrade phenol waste. The photocatalysis process can degrading waste compounds become more environmentally friendly compounds, namely CO2 and H2O. To increase the adsorption ability and photocatalysis process efficiency, titanium dioxide was added with carbon-based materials namely graphene. The addition of magnetic materials such as Fe3O4 is expected to facilitate the process of separating photocatalyst with magnetic fields. This research was aims to get graphene/TiO2/Fe3O4 composites for separation of phenol photodegradation results and characterizing graphene/TiO2/Fe3O4 composite. Procedure of this research started with the modification of graphene with cocoPAS surfactant, synthesis of Fe3O4, and synthesis of graphene/TiO2/Fe3O4 composite, performance test of composite using phenol and then magnetic separation test. Morphology of composite graphene/TiO2/Fe3O4 were characterized using SEM analysis. Concentration of phenol photodegradation results were analized using UV-Vis spectrophotometer. The synthesized graphene/TiO2/Fe3O4 composite is successfully in degrading phenol by 57,45 % with the magnetic separation test is 60 minutes.Keywords: photodegradation, magnetic composite, titanium dioxide, graphene, magnetite
Pemanfaatan Fly Ash Batu Bara Sebagai Adsorben Logam Berat Ion Pb2+ Yang Terlarut Dalam Air Fauzan, Ananda; Aman, Aman; Drastinawati, Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Utilization of coal into an energy source, resulting in another effectare pollution, such as fly ash generated from burning coal. For that, we need an alternative to overcome this problemis by using fly ash as an adsorbent to adsorb heavy metals lead (Pb 2+) are dissolved in water through adsorption process. This study aimed to calculate the amount of adsorbate (Pb 2+)are adsorbed by the fly ash with mevariasikan adsorbate concentration (Pb 2+) and stirring speed to determine the equilibrium models. The use of fly ash adsorption of 1 g, the sample solution (Pb 2+) on the variation of the concentration of 3, 7, 11 mg/l and variation of stirring speed of 100 rpm and 130 rpm. Solution (Pb 2+) have been obtained and analyzed using AAS, diketahi that the higher the stirring speed jerap capacity fly ash adsorbent (Qe) so that the smaller the amount of adsorbate (Pb) are adsorbed on the wane. In the stirring speed of 100rpm and 130 rpm Qe value is 0.585 mg/g and 0.55 mg/g. Mechanisms of Pb adsorption by fly ash is dominated by the Freundlich isotherm models that represent physical adsorption,where Pb adsorbed by the active site of the fly ash with the influence of the van der walls.Keyword :Fly ash, Adsorbate (Pb 2+)
Anti-Chinese Incident in West Java in 1963 Pangestu, Dimas Aldi; Kumalasari, Dyah; Aman, Aman
Paramita: Historical Studies Journal Vol 31, No 1 (2021): Maritime and Socio-Economic History of Indonesia
Publisher : History Department, Semarang State University and Historian Society of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/paramita.v31i1.23428

Abstract

Abstract: The paper aims to study the anti-Chinese incident in West Java. The research used the historiography method from Kuntowijoyo with the steps including topic selection, heuristic, source criticism, interpretation, and historiography. Ever since Indonesia's independence, the relationship between Pribumi and Chinese people is in social and economic discrepancy as they were experiencing an economic crisis. The strays of PRRI/Permesta and DI/TII still hold their grudge within the tough situation. What comes after is the riot between March and May 1963 that put Chinese people as the main target. On March 27, 1963, a raid happened in Cirebon initiated by the Pribumi. They attack the shops and houses of the Chinese people. The riot spread to Bandung on May 10, 1963, started with a fistfight between Chinese and Pribumi students in Bandung Institute of Technology. A day after, another riot is happening in Sumedang. From May 14 until 16, 1963, a series of property assaults are carried out by youngsters, students, and citizens in Bogor and Tasikmalaya. In Garut, vandalism happened on May 17 and 18, 1963, when the shops, houses, and factories were assaulted. From May 18 until 19, 1963, another riot started in Sukabumi when the mob began attacking the merchandise, properties, food supply, and Sukabumi market. This Chinese attacking incident involving Pribumi youngsters, college and high school students, and citizens. The incident was originally planned to be carried out throughout cities in West Java, but it did not turn out well. The initiators are scattered in every part of the cities in West Java, mostly dominated by college and school students and some residents. The impact of this incident is the spike in commodity prices and further social discrepancy. Abstrak: Artikel ini bertujuan mengkaji peristiwa anti Cina di Jawa Barat. Metode yang digunakan adalah metode sejarah Kuntowijoyo dengan langkah-langkah pemilihan topik, heuristik, kritik sumber, interpretasi dan historiografi. Sejak Indonesia merdeka hubungan Pribumi dan golongan Cina mempunyai kesenjangan hubungan sosial dengan ditambah keadaan krisis ekonomi. Sisa-sisa dari PRRI/Permesta dan DI/TII masih mempunyai reaksi ketidak puasan ditengah situasi yang sedang tidak menentukan. Akibatnya pada bulan Maret-Mei terjadi tindak kerusuhan yang merugikan golongan Cina. Pada tanggal 27 Maret 1963 pecah kerusuhan di Cirebon yang digerakan oleh kalangan Pribumi yang menyerang golongan Cina dengan merusak toko-toko dan rumah-rumah. Kerusuhan tersebut menjalar ke Bandung pada tanggal 10 Mei 1963 diawali oleh perkelahian di kampus ITB antara mahasiswa Cina dengan mahasiswa Pribumi. Pada 11 Mei 1963 pengrusakan kembali terjadi di Sumedang. Pada 14-16 Mei 1963 di Bogor dan Tasikmalaya terjadi pengrusakan yang dilakukan pemuda, pelajar dan rakyat. Di Garut aksi pengrusakan pecah pada 17-18 Mei 1963 dengan merusak rumah-rumah dan toko-toko serta pabrik-pabrik. Pada 18-19 Mei 1963 dimulai aksi di Sukabumi dengan merusak dagangan, perabotan rumah, persedian makanan dan pasar Sukabumi. Peristiwa kerusuhan yang terjadi merusak barang-barang golongan Cina yang dilakukan oleh mahasiswa, pelajar dan rakyat. Peristiwa tersebut sudah direncanakan diberbagai kota di Jawa Barat, namun tidak berjalan dengan baik. Dampak yang dirasakan adalah kenaikan harga barang dan kesenjangan sosial yang semakin parah.     Cite this article: Pangestu, D.A., Kumalasari, D., Aman. (2021). Anti-Chinese Incident in West Java in 1963. Paramita: Historical Studies Journal, 31(1), 93-103. http://dx.doi.org/10.15294/paramita.v31i1.23428 
Student Perception of Online Learning Media Platform During the Covid-19 Pandemic Fahruddin, Fahruddin; Jana, Padrul; Setiawan, Johan; Rochmat, Saefur; Aman, Aman; Yuliantri, Rhoma Dwi Aria
Journal of Education Technology Vol 6, No 1 (2022): February
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jet.v6i1.42738

Abstract

Learning during the Covid-19 Pandemic requires lecturers to be able to adapt by using online learning platforms. As a result, there are different perceptions of students regarding the effectiveness of each of these platforms. The study aimed to analyze differences in students' perceptions about the effectiveness of using WhatsApp, Google Classroom, and Zoom platforms. This research method uses quantitative methods to measure the level of perception and is combined with qualitative methods to analyze student perception. The data collection method is done by distributing questionnaires through Google forms to students. The analysis used is a quantitative analysis using statistical calculation and qualitative analysis to analyze student perception. The results showed that the difference in perception in WhatsApp and Google Classroom usage was significant with an average difference of 16.933 which means WhatsApp’s perception levels are higher than Google Classroom. The difference in perception in WhatsApp and Zoom usage is significant with an average difference of 15.2 which means WhatsApp's perception level is higher than zoom. The difference in perception in Zoom and Google Classroom usage is insignificant with an average difference of 1.733 which means Zoom’s perception rate is slightly higher than Google Classroom. The study concluded that student perceptions were higher on the WhatsApp Group platform, then zoom, and finally Google Classroom. Online learning should first use the WhatsApp platform, then zoom, and finally Google Classroom.